Find the square roots of 16

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

Which expressions are equivalent to -6 + 3m

In the figure below, ∠dec ≅ ∠dce, ∠b ≅ ∠f, and segment df is congruent to segment bd. point c is the point of intersection between segment ag and segment bd, while point e is the point of intersection between segment ag and segment df. the figure shows a polygon comprised of three triangles, abc, dec, and gfe. prove δabc ≅ δgfe.